Accessing a webpage in VB.Net

Hi guys ! I am working with Visual Studio.Net 2005. I am using web browser control in form. I just want to know is it possible to retrieve the contents of web page opened in web-browser control? If yes,then please explain.....
Contents means here like i have developed a search page in html and now I want to pass the search parameters to this page through my application....How can I do this ?